From patchwork Fri Mar 1 17:11:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vladimir Sementsov-Ogievskiy X-Patchwork-Id: 13578827 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 93504C5475B for ; Fri, 1 Mar 2024 17:13:36 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rg6Ql-0007Hc-NF; Fri, 01 Mar 2024 12:12:19 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rg6QZ-00076A-OB; Fri, 01 Mar 2024 12:12:07 -0500 Received: from forwardcorp1b.mail.yandex.net ([2a02:6b8:c02:900:1:45:d181:df01]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rg6QW-0003Lc-Ar; Fri, 01 Mar 2024 12:12:06 -0500 Received: from mail-nwsmtp-smtp-corp-main-62.myt.yp-c.yandex.net (mail-nwsmtp-smtp-corp-main-62.myt.yp-c.yandex.net [IPv6:2a02:6b8:c12:621c:0:640:f00b:0]) by forwardcorp1b.mail.yandex.net (Yandex) with ESMTPS id 1FE2C60ED4; Fri, 1 Mar 2024 20:12:01 +0300 (MSK) Received: from vsementsov-lin.. (unknown [2a02:6b8:b081:a531::1:29]) by mail-nwsmtp-smtp-corp-main-62.myt.yp-c.yandex.net (smtpcorp/Yandex) with ESMTPSA id jBfRBH2IW0U0-P4UAt0Xy; Fri, 01 Mar 2024 20:12:00 +0300 Precedence: bulk X-Yandex-Fwd: 1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru; s=default; t=1709313120; bh=evquwFwzPW9xCgQIs6hUleswS73KWmV6hHOZrBNxbgk=; h=Message-Id:Date:In-Reply-To:Cc:Subject:References:To:From; b=0Sl5zxnTWbgmn8HxkewjitZnfb5BrXxnIw+Zi+WWpnMV74JUGuGccTCPRu6OgKWaj H4btOKJPwdLCJexc9TYh1NHBO9zApI+y/vlEbMaeOjf7WKVOXWg3H3viZJyol5HiIW yUpEm125nAt9cU62CxkgL9uYAn/6DmXCFdvWqoAc= Authentication-Results: mail-nwsmtp-smtp-corp-main-62.myt.yp-c.yandex.net; dkim=pass header.i=@yandex-team.ru From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org, raphael@enfabrica.net, mst@redhat.com Cc: kwolf@redhat.com, hreitz@redhat.com, pbonzini@redhat.com, berrange@redhat.com, eduardo@habkost.net, dave@treblig.org, armbru@redhat.com, eblake@redhat.com, qemu-devel@nongnu.org, vsementsov@yandex-team.ru, yc-core@yandex-team.ru Subject: [PATCH v2 5/6] qapi: device-sync-config: check runstate Date: Fri, 1 Mar 2024 20:11:42 +0300 Message-Id: <20240301171143.809835-6-vsementsov@yandex-team.ru> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240301171143.809835-1-vsementsov@yandex-team.ru> References: <20240301171143.809835-1-vsementsov@yandex-team.ru> MIME-Version: 1.0 Received-SPF: pass client-ip=2a02:6b8:c02:900:1:45:d181:df01; envelope-from=vsementsov@yandex-team.ru; helo=forwardcorp1b.mail.yandex.net X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Command result is racy if allow it during migration. Let's allow the sync only in RUNNING state. Signed-off-by: Vladimir Sementsov-Ogievskiy --- include/sysemu/runstate.h | 1 + system/qdev-monitor.c | 27 ++++++++++++++++++++++++++- system/runstate.c | 5 +++++ 3 files changed, 32 insertions(+), 1 deletion(-) diff --git a/include/sysemu/runstate.h b/include/sysemu/runstate.h index 0117d243c4..296af52322 100644 --- a/include/sysemu/runstate.h +++ b/include/sysemu/runstate.h @@ -5,6 +5,7 @@ #include "qemu/notify.h" bool runstate_check(RunState state); +const char *current_run_state_str(void); void runstate_set(RunState new_state); RunState runstate_get(void); bool runstate_is_running(void); diff --git a/system/qdev-monitor.c b/system/qdev-monitor.c index e3107a12d7..b83b5d23c9 100644 --- a/system/qdev-monitor.c +++ b/system/qdev-monitor.c @@ -23,6 +23,7 @@ #include "monitor/monitor.h" #include "monitor/qdev.h" #include "sysemu/arch_init.h" +#include "sysemu/runstate.h" #include "qapi/error.h" #include "qapi/qapi-commands-qdev.h" #include "qapi/qmp/dispatch.h" @@ -983,7 +984,31 @@ int qdev_sync_config(DeviceState *dev, Error **errp) void qmp_device_sync_config(const char *id, Error **errp) { - DeviceState *dev = find_device_state(id, true, errp); + MigrationState *s = migrate_get_current(); + DeviceState *dev; + + /* + * During migration there is a race between syncing`config and migrating it, + * so let's just not allow it. + * + * Moreover, let's not rely on setting up interrupts in paused state, which + * may be a part of migration process. + */ + + if (migration_is_running(s->state)) { + error_setg(errp, "Config synchronization is not allowed " + "during migration."); + return; + } + + if (!runstate_is_running()) { + error_setg(errp, "Config synchronization allowed only in '%s' state, " + "current state is '%s'", RunState_str(RUN_STATE_RUNNING), + current_run_state_str()); + return; + } + + dev = find_device_state(id, true, errp); if (!dev) { return; } diff --git a/system/runstate.c b/system/runstate.c index d6ab860eca..8fd89172ae 100644 --- a/system/runstate.c +++ b/system/runstate.c @@ -189,6 +189,11 @@ bool runstate_check(RunState state) return current_run_state == state; } +const char *current_run_state_str(void) +{ + return RunState_str(current_run_state); +} + static void runstate_init(void) { const RunStateTransition *p;